沙质草地3种植物群落土壤有机碳氮密度特征
武雅琳, 赵学勇, 张蕊

Characteristics of soil organic carbon and nitrogen density in three plant communities of sandy grasslands
Yalin Wu, Xueyong Zhao, Rui Zhang
图8 不同植物群落土壤物理性质、碳、氮、磷、钾及其化学计量比的冗余分析
注:图中蓝线箭头为响应变量(土壤有机碳密度、土壤氮密度),红线箭头为解释变量(土壤全磷、全钾含量、砂粒粉粒黏粒含量、土壤容重以及碳氮磷钾化学计量特征),ASP代表黄蒿+禾本科群落、CMF代表小叶锦鸡儿+杂类草群落、ASGB代表沙米+狗尾草群落。BD、SA、ST、CL、TP、TK、C∶N、C∶P、C∶K、N∶P、N∶K、P∶K、SCD、SND分别代表土壤容重、土壤砂粒含量、土壤粉粒含量、土壤黏粒含量、全磷含量、全钾含量、碳氮比、碳磷比、碳钾比、氮磷比、氮钾比、磷钾比、土壤有机碳密度和土壤氮密度
Fig.8 Redundancy analysis of soil physical properties, carbon, nitrogen, phosphorus, potassium and their stoichiometric ratios in different plant communities